TWO ULTRAPRECISE THERMAL EXPANSION INVESTIGATIONS: SODIUM SILICATE - A LOW-EXPANSION CEMENT, AND THERMAL EXPANSION UNIFORMITY OF ZERODUR
| dc.contributor.author | Hansen, Glenn Alexander | |
| dc.creator | Hansen, Glenn Alexander | en_US |
| dc.date.accessioned | 2013-05-16T09:42:02Z | |
| dc.date.available | 2013-05-16T09:42:02Z | |
| dc.date.issued | 1985 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10150/291814 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | The University of Arizona. | en_US |
| dc.rights | Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. | en_US |
| dc.subject | Sodium silicate -- Expansion and contraction -- Measurement. | en_US |
| dc.subject | Cement -- Expansion and contraction -- Measurement. | en_US |
| dc.subject | Glass-ceramics -- Expansion and contraction -- Measurement. | en_US |
| dc.title | TWO ULTRAPRECISE THERMAL EXPANSION INVESTIGATIONS: SODIUM SILICATE - A LOW-EXPANSION CEMENT, AND THERMAL EXPANSION UNIFORMITY OF ZERODUR | en_US |
| dc.type | text | en_US |
| dc.type | Thesis-Reproduction (electronic) | en_US |
| dc.identifier.oclc | 13592733 | en_US |
| thesis.degree.grantor | University of Arizona | en_US |
| thesis.degree.level | masters | en_US |
| dc.identifier.proquest | 1325951 | en_US |
| thesis.degree.discipline | Graduate College | en_US |
| thesis.degree.discipline | Optical Sciences | en_US |
| thesis.degree.name | M.S. | en_US |
| dc.identifier.bibrecord | .b15511467 | en_US |
| refterms.dateFOA | 2018-08-16T19:00:31Z |
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Satellite patches, patch expansion, and doubling time as decision metrics for invasion control: Pennisetum ciliare expansion in southwestern ArizonaEssential variables to consider for an efficient control strategy for invasive plants include dispersion pattern (i.e., satellite or invasion front) and patch expansion rate. These variables were demonstrated for buffelgrass [Pennisetum ciliare (L.) Link], a C-4 perennial grass introduced from Africa, which has invaded broadly around the world. The study site was along a roadway in southern Arizona (USA). The P. ciliare plant distributions show the pattern of clumping associated with the satellite (nascent foci) colonization pattern (average nearest neighbor test, z-score -47.2, P <0.01). The distance between patches ranged from 0.743 to 12.8 km, with an average distance between patches of 5.6 km. Median patch expansion rate was 271% over the 3-yr monitoring period versus 136% found in other studies of established P. ciliare patches. Targeting P. ciliare satellite patches as a control strategy may exponentially reduce the areal doubling time, while targeting the largest patches may have less effect on the invasion speed.
